package collection;

import java.util.ArrayList;
import java.util.List;

/**
 * List subList(int start,int end)
 * 截取指定范围内的子集
 */
public class ListDemo3 {
    public static void main(String[] args) {
        //泛型只能指定引用类型,对于基本类型而言要指定它的包装类
        List<Integer> list = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            list.add(i);
        }
        System.out.println(list);
        //获取3-7
        List<Integer> subList = list.subList(3,8);
        System.out.println(subList);

        //子集元素扩大十倍
//
//        for (Integer age : subList) {
//            age*=10;
//        }
        for (int i = 0; i < subList.size(); i++) {
            subList.set(i,subList.get(i)*10);
        }
        System.out.println(subList);
        /*
            操作子集元素就是操作原集合对应的元素
         */
        System.out.println(list);

        //删除List集合中的2-8
        list.subList(2,9).clear();
        System.out.println(list);
        System.out.println(list);
    }

}
